Ant Mimic Spider
  Castianeira sp.  
Order: Araneae
Family: Corrinidae
Physical Characteristics
Ovular or pear shaped. Elongated in ant mimics.    
Ovular. Dark brown, grey or black with some light white-tan markings    
Have a few pairs of ventral spines on the anterior tibia.    
1.0-15.0 mm
Eye Pattern:
  Found on the ground, underneath rocks and in leaf litter.
    Widespread throughout North America  
  Web Type:    
  Make sacs to retreat to or lay eggs in.  
Fun Fact:    
  Though most species of Corrinidae are nocturnal the ant mimics such as Castianeira are diurnal for the purpose of interacting with ants during the time they are active. Some species hunt ants pointing their two front legs out above their heads as though they were antennae.